Engine.



I. D. HOWE.

ENGINE.

APPLICATION FILED mm: 2a, 1006.

E d a m i M F P w my a I g hm m id M m IL \M\\ \W d 6 9 E f 6 5 8 0 9 ATTORNEY 5 UNITED STATES PATENT OFFICE.

ENGINE.

Specification or Letters Patent.

Patented Jan. 6, I 909.

Application filed 11111923, 1906. Serial 80,823,049.

To all whom it may concern:

Be it known that I, FRANK D. HOWE, a citizen of the United States, residing in Port Washington, county of Nassau, and State of New York, have invented certain newancl useful Improvements in Engines, of which the following is a specification, reference being had to the accompanying drawings, forming a part hereof. I

It is desirable particularly in internal combustion engines, to reduce to a minimum the amount of lubricating oil which commonly works by the piston into the combustion chamber. If some means are not provided toward this end, the film of oil around the piston upon the sides of the cylinder gradually works inwardly into the combustion chamber Where it becomes more or less carbonized and interferes to a considerable extent with the even running of the engine.

A common way of lubricating the cylinder of an explosion engine and particularly an upri ht ex losion engine is W at is known as the splas ..method, in which a quantity of lubricating oil is provided in the closed crank-case of the en ine so that the crank, revolving therein, wi splash the oil up into the open end of the cylinder, thus keeping a film of oil on the interior surface of the same. It frequently happens, however, that this film of oil, which, of course is constantl renewed by the splashing, is carried up a ove the piston and the oil caused to accumulate in the upper part of the cylinder, where it is decom osed or carbonized by the heat produced y the explosions, fouling the parts and impairing the operation of the engine, chiefly by carbonizing' the sparker or igniter and thus interfering with ignition. sary, of course, that a certain uantity of oil be spread over the cylinder su ace, for lubrication, and hence 1t is only the excessive traveling or creeping of the oil that should be revented.

he object of the resent invention is to provide a very simp e means for avoiding this ob'ection almost alto ether, which means s all not necessitate t e addition of extra parts or involve any considerable expense in its embodiment in an engine.

Broadly considered the invention consists in providing means upon the piston such as a sharp edge for shearing off the film of oil around the piston upon the sides of the cylin- It is neces tically working piston, an in said drawings,

Figure 1 is a view in vertical central section of the engine showing the piston in side'elevation and, Figs. 2 and 3 are detailviews in central vertical section through'two pistons showing modifications.

The workin cylinder, or more specifically, if the engine e of'the internal combustion type, the combustion chamber is indicated by the letter a and the piston which, as shown, is of the ordinary hollow'variety, by the letter b. The piston -may be provided with any suitable number of packingringsc which are sprung into peripheralrecesses in the piston as usual so as to bear outwardly against the sides of the cylinder (1 formin the working chamber. Just ahead of one o the rings, preferably the foremost ring as shown, a recess e is rovided which mayextend around the entire piston, and-the-edge f of this ring, the edge towardtheforward end of the piston, is made quite sharp. Gooperatin with the recess e is a rehef therefor, whic as shown in Fig. 1 is afi'ordedby the space formed between a wrist-pin g to which t e pitman may be attached and the bearings h in the iston for such wrist-pin. In Fig. 2 channes i are illustrated connecting the recess 0 with the interior of the iston to afford a relief for the recess. It W] 1 be obvious that a relief for the recess may be provided in various ways.

In operation, the forward movement of the piston, that is its movement away from or out of the c linder, causes the sharp edge f of the ring adiacent to the recess e to shear off the film of oil around the sides of the cylinder and to deposit. such oil in the recess e whence it finds its we back through the relief to the source of lu rication or to some other convenient deposito In practice, the lubricating oil in vertica engines is often deposited below the piston an is splashed by the pitman against the sides of the oylmder. In such a case, the oil escapin through the relief can obviously be allowe to drip back through the interior of the piston into .the oil beneath. L a;

It is obvious that the improvements may be embodied in other;wa s t an those shown, described or referred to erein.

I claim as my invention:

1. In an engine, the combination with the engine cylinder, of a piston therein a piston ring pressing against the walls of the cylinder, a recessto receive oil from the inner surface of the cylinder, and a relief for the re cess.

2. In an engine, the combination of a working chamber, a piston therein having a peripheral recess, and a in the recess pressing against the walls 0 the chamber, said piston having a second recess arranged next to the ring so as to receive the oil scra ed b the ring from the walls of the worl r ing c amber.

3. In an engine, the combination of a working chamber, a piston therein having a peripheral recess, a in the recess against the walls of the chamber, sai piston having a second recess ad'acent to the ring, and a relief for said secon recess.

4. In an engine, the combination of a working chamber, a piston therein having a peripheral recess, a ring in the recess having as arp edge toward the forward end of the piston, sai piston having a second recess ad- Jacent to the ring, and a relief for said second recess into the interior of the iston.

5. In an engine, the com ination of a worliing chamber, a hollow iston therein having a peripheral recess, an a r' in the recess having a sharp edge toward t e forward and of the piston, said piston having a second recess extending around its periphery ressmg eoeasee just ahead of the ringfland channels connectmg said recess with t e hollow of the iston.

6. In an engine, the combination with the engine cylinder, of a piston therein, a piston ring pressing against the walls of the cylinder, a recess next to the ring to receive oil from the inner surface of the cylinder, and a relief for the recess.

7. In an engine, the combination with the engine cylinder, of a piston therein, and a sharp edge extending around the peri hery of the piston adapte to remove the oil from the inner surface of the cylinder as the iston moves in a direction away from the cy inder or out of the cylinder.

8. In a vertical engine, the combination with the cylinder, of a piston working therein and provided with means for removing oil from the inner surface of the cylinder as the piston moves downwardly and dischargiing it from a point removed from said surace.

9. In an engine, the combination with the engine cylinder, of a piston therein ha a wrist-pin, a piston ring pressing against t e V walls of the cylinder, a recess to receive oil from the inner surface of the cylinder, and a relief for the recess around the wrist-pin.

10. In an engine, the combination with the engine cylinder, of a piston therein, a piston ring, a .recess into which the ring is adapted to scrape oil, and a relief for the recess This specification s' ned and witnessed this 20th day of June, D. .1906.

FRANK D. HOWE. Signed in the resence of HOMER Snow, FRANCIS E. Vanna-.1. 

